Photoshop CS6 shuts down at startup

I have Photoshop CS6 for the PC (windows 8.1) and I recently got a problem.
Photoshop CS6 unexpetedly started shutting down a couple seconds after I started it without me even doing anything. No warning message. Nothing. It just randomely started shutting down aproximately four seconds after I started it.

I tried uninstalling it and reinstalling it, without success. I tried reinstalling windows. It didn't work. I can't see anything about Photoshop in Windows event viewer.

I absolutely need my PS for work. I don't know how to fix it but I has to work as soon as possible.